Σεισμικά Κύματα

What causes earthquakes on Earth?

• Sudden release of energy

• Movement of tectonic plates

• Both A and B

• None of the above

What are the primary types of seismic waves?

• Longitudinal waves

• Transverse waves

• Both A and B

• Surface waves

Τι είναι η εστία ενός σεισμού;

• The area around the point from which seismic waves seem to start.

• The projection of the focus on the Earth's surface.

• The distance between the focus and the epicenter.

• The energy released by an earthquake.

What is the epicenter of an earthquake?

• The area around the point from which seismic waves seem to start.

• Η προβολή της εστίας στην επιφάνεια της γης

• The distance between the focus and the epicenter.

• The energy released by an earthquake.

What is the focal depth of an earthquake?

• The area around the point from which seismic waves seem to start.

• The projection of the focus on the Earth's surface.

• The distance between the focus and the epicenter.

• The energy released by an earthquake.

What does the magnitude of an earthquake indicate?

• How strong an earthquake is.

• The area around the point from which seismic waves seem to start.

• The projection of the focus on the Earth's surface.

• The distance between the focus and the epicenter.

What is the Richter scale used for?

• To measure the energy released by an earthquake.

• To determine the focal depth of an earthquake.

• To find the epicenter of an earthquake.

• To classify the types of seismic waves.

What does a magnitude of 1 indicate?

• Not felt

• Felt only under certain conditions

• Slightly felt indoors

• Moderately felt indoors

What is the maximum value on the Mercalli scale?

• 10

• 12

• 8

• 6

Most earthquakes occur due to the movements of the tectonic plates and are called tectonic earthquakes.